Abstract
The efficient operation of polymer light-emitting diodes (LEDs) requires balanced injection and transport of electrons and holes. This has stimulated much research into suitable electron-injecting and transporting materials. We report the use of polypyridine as an efficient electron-transporting polymer. We have achieved much-improved LED performance by incorporating polypyridine as an electron-transporting layer in a poly(p-phenylene vinylene) (PPV) LED and optimizing layer thicknesses to balance transport of electrons and holes. The external quantum efficiency of these LEDs is 0.25%, 60 times greater than similar devices without the electron-transporting layer.
| Original language | English |
|---|---|
| Pages (from-to) | 5171 |
| Number of pages | 5171 |
| Journal | Journal of Physics: Condensed Matter |
| Volume | 10 |
| Publication status | Published - 15 Jun 1998 |
Keywords
- ELECTROLUMINESCENT DEVICES
- CONJUGATED POLYMERS
- DERIVATIVES
- POLY(2,2'-BIPYRIDINE-5,5'-DIYL)
- POLY(PYRIDINE-2,5-DIYL)
- PHOTOLUMINESCENCE
- STATES